Power plant rainwater filtering device and power plant rainwater recycling system

Abstract

The invention discloses a power plant rainwater filtering device and a power plant rainwater recycling system, and relates to the technical field of power plant rainwater recycling. The power plant rainwater filtering device comprises a water collecting tank, a filtering well, a liquid inlet pipe, a sewage discharging assembly, a chemical feeding assembly and a liquid discharging assembly, the water collecting tank is provided with a buffering cavity, the filtering well is arranged in the buffering cavity and provided with a filtering cavity, and the liquid inlet pipe is used for conveying rainwater to the filtering cavity; the sewage discharging assembly comprises a sewage discharging pipe which is communicated with the filtering cavity, one end of the sewage discharging pipe extends out of the buffering cavity, the chemical feeding assembly comprises a spraying pipe used for feeding a flocculating agent into the filtering cavity, and the liquid discharging assembly comprises a first liquid discharging pipe used for discharging filtered rainwater in the buffering cavity. According to the power plant rainwater filtering device, under the condition that the rainwater filtering effect is guaranteed, the floating range of flocculent precipitates and filtered impurities can be limited, the flocculent precipitates can be subjected to self-cleaning operation, cleaning is convenient and fast, and the cleaning maintaining range and cost are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of rainwater recycling in power plants, and in particular to a rainwater filtering device and a rainwater recycling and reuse system in power plants. Background Art

[0002] As the main power supply site, power plants require a large amount of water for cooling systems, boiler replenishment and other uses during their operation. Generally, the water resources of power plants mainly come from the replenishment of surrounding reservoirs. Due to the large amount of water used, the economic cost is relatively high. In order to reduce production costs, power plants recycle natural precipitation to increase economic benefits, while improving the environmental protection emissions and energy-saving effects of water use.

[0003] In the related art, a rainwater recovery system is set up in a power plant, which includes a rainwater recovery component, a filtering component, a conveying component and a water reservoir. The rainwater recovery component is set at one end of the water reservoir, a slide rail is set inside the water reservoir, the filtering component is slidably set on the upper part of the water reservoir, and the conveying component is partially set at the bottom of the water reservoir. Rainwater in the power plant can be effectively collected and filtered and conveyed, saving resources, alleviating the problem of insufficient water resources, and reducing maintenance costs.

[0004] However, in order to increase the amount of rainwater collected during use, the water tank generally occupies a larger area, and the laying of the filter component in the entire water tank will increase the cost of the entire rainwater recovery device. At the same time, since the filter component is arranged inside the water tank and flocculated sediments are easily deposited in the water tank, the filter component and the water tank are troublesome to clean, which affects the rainwater recovery and treatment effect. Summary of the invention

[0005] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0006] To this end, an embodiment of the present invention proposes a power plant rainwater filtration device, which can limit the floating range of flocculated sediments and filtered impurities while ensuring the rainwater filtration effect, and perform self-cleaning operations on the flocculated sediments, which is convenient for cleaning and reduces the scope and cost of maintenance and cleaning.

[0007] The embodiment of the present invention also provides a rainwater recycling and reuse system for a power plant.

[0008] The power plant rainwater filtering device according to the embodiment of the present invention comprises:

[0009] A water collecting tank, wherein the water collecting tank has a buffer chamber;

[0010] A filter well, the filter well comprising a first tube, a second tube, a filter plate and a connecting plate, the first tube being arranged in the water collecting box in the up-down direction and part of the first tube extending out of the buffer cavity, the second tube being coaxially arranged in the first tube and communicating with the buffer cavity, the filter plate being arranged in the second tube, the connecting plate being arranged between the first tube and the second tube and limiting the filter cavity with the first tube and the second tube;

[0011] a liquid inlet pipe, the liquid inlet pipe being connected to the first pipe and used for conveying the collected rainwater into the filter cavity;

[0012] A sewage discharge assembly, the sewage discharge assembly comprising a sewage discharge pipe connected to the filter cavity, the other end of the sewage discharge pipe extending out of the buffer cavity;

[0013] A dosing assembly, the dosing assembly comprising a nozzle, the nozzle is arranged in the first tube and is used to deliver flocculant into the filter cavity;

[0014] A drainage component includes a first drainage pipe connected to the buffer chamber, and the first drainage pipe is used to discharge the filtered rainwater in the buffer chamber.

[0015] The power plant rainwater filtration device of the embodiment of the present invention can limit the floating range of flocculated sediments and filtered impurities while ensuring the rainwater filtration effect, and perform self-cleaning operations on the flocculated sediments, which is convenient for cleaning and reduces the scope and cost of maintenance and cleaning.

[0016] In some embodiments, the dosing assembly includes a medicine box, a rotating box, a rotating rod and a driving member. The medicine box is arranged on the first tube, the rotating box is rotatably arranged below the medicine box and is connected to the medicine box, the rotating box is provided with a medicine discharge hole, the nozzle is fixedly connected to the rotating box corresponding to the medicine discharge hole, the rotating rod is passed through the filter plate and is rotatably connected to the filter plate, and the rotating rod is fixedly connected to the nozzle, and the driving member is connected to the rotating rod and is used to drive the rotating rod to rotate.

[0017] In some embodiments, the dosing assembly includes a plurality of stirring blades, the stirring blades are fixedly connected to the nozzle, and the plurality of stirring blades are arranged in the filter chamber at intervals along the circumference of the first tube;

[0018] And / or, the driving member is a plurality of driving blades, the plurality of driving blades are spaced apart on the rotating rod, the driving blades are arranged in the second tube and on the side of the filter plate away from the medicine box, and the driving blades are inclined and used to rotate under the action of water flow.

[0019] In some embodiments, the drug administration assembly includes a sealing plate arranged corresponding to the drug discharge hole, the sealing plate is adjustable in position in the rotating box, and the sealing plate is used to open or block the drug discharge hole.

[0020] In some embodiments, the dosing assembly includes a sealing cylinder, a first elastic member, a driving plate and a traction member. The sealing cylinder cover is arranged at the bottom of the rotating box. The sealing plate moves radially along the sealing cylinder and is sealingly penetrated by the sealing cylinder. The first elastic member is arranged corresponding to the sealing plate. The two ends of the first elastic member are respectively connected to the sealing plate and the side wall of the rotating box and are used to drive the sealing plate to move away from the sealing cylinder. The driving plate is arranged on the rotating rod and its axial position is adjustable along the rotating rod. The driving plate is used to move away from the medicine box under the action of water flow. The two ends of the traction member are connected to the sealing plate and the driving plate.

[0021] In some embodiments, a troubleshooting well is included, the troubleshooting well includes a third tube and a liquid level meter, the third tube is passed through the water collecting tank and part of the third tube passes through the water collecting tank, the third tube is connected to the buffer chamber, and the liquid level meter is arranged in the third tube.

[0022] In some embodiments, a controller is included, and the drainage assembly includes a water pump, a shunt pipe, a switching valve, a second drainage pipe, and a spare tank. The water pump is arranged in the buffer chamber, the shunt pipe is arranged at the infusion end of the water pump, the switching valve is arranged at the end of the shunt pipe and is provided with a first interface and a second interface. The controller is electrically connected to the switching valve and is used to drive the output end of the switching valve to directly switch between the first interface and the second interface. The first drainage pipe is connected to the first interface, the second drainage pipe is connected to the second interface, and the second drainage pipe is connected to the spare tank.

[0023] In some embodiments, the water collecting tank includes a bottom plate, the side surface of the bottom plate located in the buffer chamber is arranged in a slope, the filter well is arranged at the bottom of the slope, the inspection well is arranged at the top of the slope, the sewage discharge assembly includes a sewage suction pipe and a connecting pipe, the sewage suction pipe is arranged at the bottom of the buffer chamber, a plurality of sewage suction holes are arranged at intervals on the sewage suction pipe, the connecting pipe is connected to the first pipe and communicated with the filter chamber, the other end of the connecting pipe is communicated with the sewage suction pipe, and the sewage discharge pipe is connected with the sewage suction pipe.

[0024] In some embodiments, an overflow pipe is provided on the first pipe, the overflow pipe is at the same height as the liquid inlet pipe, and a filter element for filtering rainwater is provided at one end of the overflow pipe connected to the first pipe;

[0025] And / or, a portion of the first tube located in the buffer cavity is provided with a plurality of filter windows spaced apart along the circumferential direction, and the filter windows are provided above the filter plate.

[0026] The power plant rainwater recycling and reuse system according to the embodiment of the present invention comprises the power plant rainwater filtering device according to any one of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of a power plant rainwater filtering device according to an embodiment of the present invention.

[0028] Figure 2 It is a cross-sectional view of a power plant rainwater filtering device according to an embodiment of the present invention.

[0029] Figure 3 It is a schematic diagram of the structure of a filter well in a rainwater filtration device for a power plant according to an embodiment of the present invention.

[0030] Figure 4 It is a structural schematic diagram of a dosing assembly in a power plant rainwater filtration device according to an embodiment of the present invention.

[0031] Figure 5 It is a structural schematic diagram of a rotating box in a power plant rainwater filtering device according to an embodiment of the present invention.

[0032] Figure 6 It is a connection diagram of a sealing plate in a power plant rainwater filtration device according to an embodiment of the present invention.

[0033] Figure 7 It is a schematic structural diagram of a transfer rod in a power plant rainwater filtering device according to an embodiment of the present invention.

[0034] Figure 8 It is a schematic structural diagram of a drainage component in a rainwater filtration device for a power plant according to an embodiment of the present invention.

[0035] Reference numerals:

[0036] Water collecting tank 1; buffer chamber 101; bottom plate 102;

[0037] Filter well 2; first tube 201; filter window 2011; second tube 202; filter plate 203; connecting plate 204;

[0038] Liquid inlet pipe 3;

[0039] Sewage discharge assembly 4; sewage discharge pipe 401; sewage suction pipe 402; sewage suction hole 4021; connecting pipe 403;

[0040] Dosing assembly 5; nozzle 501; medicine box 502; rotating box 503; rotating rod 504; expansion tank section 5041; driving member 505; stirring blade 506; sealing plate 507; sealing cylinder 508; first elastic member 509; driving plate 510; traction member 511; second elastic member 512;

[0041] Liquid discharge assembly 6; first liquid discharge pipe 601; water pump 602; shunt pipe 603; switching valve 604; second liquid discharge pipe 605; spare tank 606;

[0042] Investigation well 7; third pipe 701; liquid level measuring device 702;

[0043] Overflow pipe 8; filter element 81. DETAILED DESCRIPTION

[0044] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0045] like Figures 1 to 8 As shown, the power plant rainwater filtration device of the embodiment of the present invention includes a water collecting box 1, a filter well 2, a liquid inlet pipe 3, a sewage discharge component 4, a dosing component 5 and a liquid discharge component 6. The height direction of the water collecting box 1 is defined as the up and down direction. The water collecting box 1 has a buffer cavity 101. The filter well 2 includes a first pipe 201, a second pipe 202, a filter plate 203 and a connecting plate 204. The first pipe 201 is arranged in the water collecting box 1 along the up and down direction and a part of the first pipe 201 extends out of the buffer cavity 101. The second pipe 202 is coaxially arranged on the first pipe 201 and communicates with the buffer cavity 101. The filter plate 203 is arranged on the second pipe 202. The connecting plate 204 It is arranged between the first tube 201 and the second tube 202 and limits the filter chamber together with the first tube 201 and the second tube 202. The liquid inlet pipe 3 is connected with the first tube 201 and is used to transport the collected rainwater into the filter chamber. The sewage discharge component 4 includes a sewage discharge pipe 401 connected with the filter chamber, and the other end of the sewage discharge pipe 401 extends out of the buffer chamber 101. The dosing component 5 includes a nozzle 501, which is arranged in the first tube 201 and is used to add flocculant to the filter chamber. The drainage component 6 includes a first drainage pipe 601 connected with the buffer chamber 101, and the first drainage pipe 601 is used to discharge the filtered rainwater in the buffer chamber 101.

[0046] When the power plant rainwater filtering device of the embodiment of the present invention is in use, the collected rainwater enters the filter chamber in the first tube 201 through the liquid inlet pipe 3, the filter plate 203 on the second tube 202 can filter the silt impurities in the rainwater, and add flocculant to the filter chamber through the nozzle 501 in the dosing assembly 5, so that the rainwater in the filter chamber generates flocculated sediment under the action of the flocculant, and the filtered rainwater can enter the buffer chamber 101 through the second tube 202, and the filtered silt impurities and flocculated sediment are precipitated between the first tube 201 and the second tube 202. Under the pressure of the water body in the filter chamber, the silt impurities and flocculated sediment in the filter chamber can be discharged through the sewage pipe 401, thereby realizing the cleaning of the filter material while realizing the filtration operation of the rainwater.

[0047] The power plant rainwater filtration device of the embodiment of the present invention can limit the floating range of flocculated sediments and filtered impurities while ensuring the rainwater filtration effect, and perform self-cleaning operations on the flocculated sediments, which is convenient for cleaning and reduces the scope and cost of maintenance and cleaning.

[0048] Optionally, the filter plate 203 is arranged on the top of the second tube 202, and the filter plate 203 is a hemispherical or upwardly protruding arc plate, which can prevent mud and sand impurities or flocculated sediments from gathering in the second tube 202. At the same time, the filter plate 203 can be washed by the flow of rainwater to ensure the filtering effect of the filter plate 203.

[0049] Optionally, the bottoms of the first tube 201 and the second tube 202 are flush, and the connecting plate 204 is arranged at the bottom of the first tube 201. When the sizes of the first tube 201 and the second tube 202 are constant, the volume of the filter cavity is increased, thereby increasing the silt impurities and flocculated sediments that can be stored in the filter cavity, avoiding clogging of the filter plate 203 and ensuring the filtering effect of rainwater.

[0050] In some embodiments, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the dosing assembly 5 includes a medicine box 502, a rotating box 503, a rotating rod 504 and a driving member 505. The medicine box 502 is arranged on the first tube 201, the rotating box 503 is rotatably arranged below the medicine box 502 and is connected to the medicine box 502, the rotating box 503 is provided with a medicine discharge hole, the nozzle 501 is fixedly connected to the rotating box 503 corresponding to the medicine discharge hole, the rotating rod 504 is penetrated by the filter plate 203 and is rotatably connected to the filter plate 203, and the rotating rod 504 is fixedly connected to the nozzle 501, and the driving member 505 is connected to the rotating rod 504 and is used to drive the rotating rod 504 to rotate.

[0051] Specifically, the medicine box 502 is connected to the first tube 201 through a fixed frame, a medicine adding hole is provided on the top of the medicine box 502, a through hole is provided on the bottom of the medicine box 502, a rotating box 503 is coaxially rotated and arranged below the medicine box 502, and the nozzle 501 is arranged corresponding to the medicine discharge hole on the rotating box 503. The flocculant in the medicine box 502 enters the rotating box 503 through the through hole, and then enters the filter cavity along the nozzle 501. A sealed bearing is provided at the position where the rotating rod 504 is connected to the filter plate 203, and a rotation connection with the filter plate 203 is achieved through the bearing. A connecting rod is provided on the rotating rod 504 corresponding to the nozzle 501, and a fixed connection between the rotating rod 504 and the nozzle 501 is achieved through the connecting rod. The driving member 505 drives the rotating rod 504 to rotate, thereby driving the rotating box 503 and the nozzle 501 to rotate, thereby achieving uniform delivery of flocculant in the filter cavity, thereby ensuring the flocculation and sedimentation effect on rainwater.

[0052] Optionally, the output end of the nozzle 501 is located between the first tube 201 and the second tube 202 and below the filter plate 203, so as to prevent the flocculant released by the nozzle 501 from directly entering the buffer chamber 101 through the filter plate 203, thereby ensuring the flocculation and sedimentation effect on the rainwater in the filter chamber.

[0053] In some embodiments, Figure 3 and Figure 4 As shown, the dosing assembly 5 includes a plurality of stirring blades 506, which are fixedly connected to the nozzle 501, and the plurality of stirring blades 506 are arranged in the filter chamber at intervals along the circumference of the first tube 201. By arranging the stirring blades 506, the stirring blades 506 are driven to rotate while the rotating rod 504 rotates, thereby increasing the flow speed of rainwater in the filter chamber, accelerating the diffusion effect of the flocculant in the rainwater in the filter chamber, and ensuring the flocculation and sedimentation effect of the rainwater in the filter chamber.

[0054] In some embodiments, Figure 4 and Figure 6 As shown, the driving member 505 is a plurality of driving blades, which are spaced apart on the rotating rod 504. The driving blades are disposed in the second tube 202 and on the side of the filter plate 203 away from the medicine box 502. The driving blades are inclined and are used to rotate under the action of water flow.

[0055] Specifically, the driving blades are arranged to be inclined along the radial direction of the rotating rod 504, or along the circumferential direction of the rotating rod 504, or along the radial and circumferential directions of the rotating rod 504 at the same time. When passing through the driving blades, the driving blades are driven to rotate, and then the rotating rod 504 is driven to rotate. Compared with the use of a driving motor, the circuit layout is reduced, the structure is simple, and the use of electricity is reduced, which is energy-saving and environmentally friendly.

[0056] Optionally, the driving blades are arranged in the second tube 202, and the driving blades are driven to rotate when the water passing through the filter plate 203 passes through the driving blades. During the filtering process, the water flow passing through the second tube 202 exists at all times, which can avoid the inability to drive the rotating rod 504 to rotate when the water in the filter chamber overflows the driving blades.

[0057] In some embodiments, Figure 5 and Figure 6 As shown, the dosing assembly 5 includes a sealing plate 507 arranged corresponding to the drug discharge hole. The sealing plate 507 is adjustable in position inside the rotating box 503. The sealing plate 507 is used to open or block the drug discharge hole. By setting the sealing plate 507, the opening and closing of the drug discharge hole can be accurately regulated, thereby ensuring the accurate delivery of the flocculant and the flocculation and sedimentation effect on rainwater.

[0058] In some embodiments, the dosing assembly 5 includes an electric hydraulic push rod, which extends radially along the rotating box 503. The end of the electric hydraulic push rod is connected to the sealing plate 507. The position of the sealing plate 507 is adjusted by the electric hydraulic push rod. The structure is simple and easy to install and adjust.

[0059] In some embodiments, Figure 5 , Figure 6 and Figure 7 As shown, the dosing assembly 5 includes a sealing cylinder 508, a first elastic member 509, a driving plate 510 and a traction member 511. The sealing cylinder 508 is covered at the bottom of the rotating box 503. The sealing plate 507 moves radially along the sealing cylinder 508 and is sealingly penetrated by the sealing cylinder 508. The first elastic member 509 is arranged corresponding to the sealing plate 507. The two ends of the first elastic member 509 are respectively connected to the sealing plate 507 and the side wall of the rotating box 503 and are used to drive the sealing plate 507 to move away from the sealing cylinder 508. The driving plate 510 is arranged on the rotating rod 504 and its axial position along the rotating rod 504 is adjustable. The driving plate 510 is used to move in the direction away from the medicine box 502 under the action of water flow. The two ends of the traction member 511 are connected to the sealing plate 507 and the driving plate 510.

[0060] Specifically, a perforation is provided at the center of the bottom of the rotating box 503, and a sealing cylinder 508 is coaxially covered with a corresponding perforation at the bottom of the rotating box 503, and a movable space is limited between the sealing cylinder 508 and the rotating box 503. The sealing plate 507 is movably provided at the bottom of the sealing cylinder 508 along the radial direction of the sealing cylinder 508 corresponding to the discharge hole, and the sealing plate 507 is sealed with the sealing cylinder 508 to prevent the flocculant from passing through the sealing cylinder 508 and being discharged through the perforation. The first elastic member 509 adopts a tension spring, which is tensioned. The two ends of the spring are connected to the sealing plate 507 and the side wall of the rotating box 503 respectively. In the absence of external force, the tightening spring drives the sealing plate 507 to move away from the sealing cylinder 508 to block the medicine discharge hole. The rotating rod 504 is provided with a through groove, and the end of the through groove away from the medicine box 502 is provided with a radially extending sliding groove. The driving plate 510 includes a plate body, a connecting block and a sliding block. The plate body and the sliding block are coaxially arranged. The plate body is slidably arranged on the rotating rod 504, and the connecting block is arranged between the plate body and the sliding block and slides. The slider is slidably arranged in the first perforation, and the traction member 511 is a traction rope, and the two ends of the traction rope are respectively connected to the sealing plate 507 and the slider. When the plate body moves in the direction away from the medicine box 502, the sealing plate 507 is driven by the traction rope to move in the direction close to the sealing tube 508 to open the medicine discharge hole. At this time, the first elastic member 509 is stretched by the force, and the driving force of the plate body is the flowing water. When the force of the water flow on the plate body disappears, the first elastic member 509 can drive the sealing plate 507 to reset and block the medicine discharge hole, thereby realizing the automatic delivery of the medicine according to the flow of the water body. The operation is convenient, safe and reliable. At the same time, since the descent of the plate body is continuously affected by the water flow, the flocculant inside the medicine box 502 can be continuously sprayed during the water storage process of the buffer chamber 101 to meet the reaction dosage requirements. Compared with the use of an electric hydraulic push rod to adjust the position of the sealing plate 507, it can save circuit settings and avoid power consumption, which is easy to install and energy-saving and environmentally friendly.

[0061] Optionally, an expansion groove section 5041 is provided in correspondence with the slide groove of the through groove, and a second elastic member 512 is fixedly provided on the top of the expansion groove section 5041. The second elastic member 512 is a tensioning spring, and the other end of the tensioning spring is connected to the slider, which is used to drive the slider to move toward the direction close to the medicine box 502 when there is no external force, so as to reset the driving plate 510 and facilitate the first elastic member 509 to drive the sealing plate 507 to seal the medicine discharge hole.

[0062] Optionally, the driving plate 510 is arranged in the second tube 202. When the water passing through the filter plate 203 passes through the driving plate 510, it drives the driving plate 510 to move away from the medicine box 502. During the filtration process, the water flow passing through the second tube 202 exists at all times, which can prevent the driving plate 510 from being unable to be driven to move when the water in the filter chamber overflows the driving plate 510 on the filter plate 203.

[0063] In some embodiments, Figure 1 , Figure 2 and Figure 8 As shown, it includes an inspection well 7, and the inspection well 7 includes a third pipe 701 and a liquid level measuring device 702. The third pipe 701 is penetrated in the water collecting tank 1 and part of the third pipe 701 passes through the water collecting tank 1, and the third pipe 701 is connected with the buffer chamber 101. The liquid level measuring device 702 is arranged in the third pipe 701. By setting the inspection well 7, the inspection well 7 and the filter well 2 can form a communicating vessel, which is convenient for the liquid level measuring device 702 to measure the water level height in the buffer chamber 101. At the same time, when rainwater overflows the buffer chamber 101 in the filter well 2, the actual water level height of the rainwater in the first pipe 201 can also be detected through the inspection well 7.

[0064] Optionally, the liquid level measurer 702 is a liquid level gauge.

[0065] In some embodiments, Figure 8 As shown, it includes a controller, and the drainage component 6 includes a water pump 602, a shunt pipe 603, a switching valve 604, a second drainage pipe 605, and a spare box 606. The water pump 602 is arranged in the buffer chamber 101, the shunt pipe 603 is arranged at the infusion end of the water pump 602, the switching valve 604 is arranged at the end of the shunt pipe 603 and is provided with a first interface and a second interface. The controller is electrically connected to the switching valve 604 and is used to drive the output end of the switching valve 604 to directly switch between the first interface and the second interface. The first drainage pipe 601 is connected to the first interface, the second drainage pipe 605 is connected to the second interface, and the second drainage pipe 605 is connected to the spare box 606.

[0066] Specifically, the water pump 602 pumps the water in the buffer chamber 101 to the switching valve 604 through the diversion pipe 603, and monitors the treatment system after the first drainage pipe 601. When the treatment system operates normally, the controller controls the switching valve 604 to switch to the first interface, and the water is discharged normally through the first drainage pipe 601. When the treatment system is overloaded, the controller controls the switching valve 604 to switch to the second interface, and the water enters the spare tank 606 through the second drainage pipe 605 to achieve temporary storage of the water, thereby ensuring full utilization of the filtered rainwater.

[0067] Optionally, the water pump 602 is disposed in the third tube 701 , and a filter is disposed at a position where the third tube 701 communicates with the buffer chamber 101 to ensure a filtering effect on the water body discharged through the pump.

[0068] In some embodiments, Figure 2 and Figure 8As shown, the water collecting tank 1 includes a bottom plate 102, and the side surface of the bottom plate 102 located in the buffer chamber 101 is arranged in a sloped surface, the filter well 2 is arranged at the bottom of the slope, and the inspection well 7 is arranged at the top of the slope. The sewage discharge component 4 includes a sewage suction pipe 402 and a connecting pipe 403. The sewage suction pipe 402 is arranged at the bottom of the buffer chamber 101, and a plurality of sewage suction holes 4021 are arranged at intervals on the sewage suction pipe 402. The connecting pipe 403 is connected to the first pipe 201 and communicated with the filter chamber, and the other end of the connecting pipe 403 is communicated with the sewage suction pipe 402, and the sewage discharge pipe 401 is communicated with the sewage suction pipe 402.

[0069] Specifically, the sewage suction pipe 402 is arranged at the bottom end of the slope of the bottom plate 102. When there is sediment in the buffer chamber 101, it can be gathered at the bottom end of the slope through the slope of the bottom plate 102. At the same time, the sediment is sucked through the sewage suction hole 4021. The sediment entering the sewage suction pipe 402 passes through the connecting pipe 403, and the mud, sand, impurities and flocculated sediment discharged from the buffer chamber 101 are discharged through the sewage discharge pipe 401, thereby realizing the self-discharge operation of the sediment in the buffer chamber 101 and reducing the amount of cleaning work of the buffer chamber 101 by personnel.

[0070] Optionally, a groove is provided at the bottom end of the slope of the bottom plate 102 for accommodating the sewage suction pipe 402. The sewage suction pipe 402 is placed in the groove, and the sewage suction hole 4021 is flush with the slope of the bottom plate 102, so as to improve the sewage suction efficiency and the cleaning effect of the sediment in the buffer chamber 101.

[0071] Optionally, two sewage suction pipes 402 are provided and are symmetrically arranged on both sides of the radial direction of the first pipe 201, and the extension direction of the two sewage suction pipes 402 is arranged in the extension direction of the slope.

[0072] In some embodiments, Figure 1 , Figure 2 , Figure 3 and Figure 8 As shown, an overflow pipe 8 is provided on the first pipe 201, and the overflow pipe 8 is at the same height as the liquid inlet pipe 3. A filter element 81 for filtering rainwater is provided at one end of the overflow pipe 8 connected to the first pipe 201. By setting the overflow pipe 8, when the water inlet rate of the filter well 2 is greater than the drainage rate, the collected rainwater accumulates at the position of the liquid inlet pipe 3, and the rainwater can be discharged through the overflow pipe 8 to prevent the rainwater from overflowing from the top of the first pipe 201. At the same time, the discharged rainwater can be preliminarily filtered by the filter element 81 in the overflow pipe 8 to reduce rainwater pollution.

[0073] Optionally, the filter element 81 is an oil-absorbing cotton filter element 81, and the outer side of the filter element 81 is connected to the inner thread of the overflow pipe 8 through a thread.

[0074] In some embodiments, Figure 2 , Figure 3 and Figure 8As shown, the portion of the first tube 201 located in the buffer chamber 101 is provided with a plurality of filter windows 2011 at intervals along the circumferential direction, and the filter windows 2011 are provided above the filter plate 203. By providing the filter windows 2011 on the first tube 201, when the flow rate of the filter plate 203 is lower than the water inlet rate in the first tube 201, the rainwater can be filtered and discharged through the filter windows 2011, thereby improving the filtering efficiency of the filter well 2 for rainwater and preventing the liquid level in the filter well 2 from being too high and overflowing from the top of the first tube 201.

[0075] Optionally, multiple water inlet pipes are provided, and the sum of the flow areas of the multiple filter windows 2011 and the flow areas of the filter plates 203 is not less than the sum of the flow areas of the multiple water inlet pipes, that is, the combined drainage volume of the multiple filter windows 2011 and the filter plates 203 is greater than the drainage volume of the multiple water inlet pipes.

[0076] The power plant rainwater filtration device according to the embodiment of the present invention has the following advantages:

[0077] (1) The filter well and the filter chamber are arranged to facilitate the pre-filtration treatment of rainwater entering the buffer chamber, and the impurities and suspended matter in the intercepted rainwater are flocculated by the reagent box and the rotating box, and the function of the sewage discharge component is cooperated to realize the separate discharge of impurities. In addition, due to the isolation effect of the filter well, the further diffusion of suspended matter in the buffer chamber is reduced, thereby reducing the scope and cost of subsequent maintenance and cleaning. At the same time, the contact time required for the reaction between the flocculant and the suspended matter in the rainwater is reduced, ensuring sufficient contact between the flocculant and the suspended matter in the rainwater, thereby improving the cleaning effect;

[0078] (2) A driving plate is provided. During the drainage process of the filter well, the driving plate can be driven downward by the impact force of rainwater, so that the flocculant in the nozzle automatically falls. Due to the effect of the second tube, the flocculant is used continuously during the entire water storage process of the buffer chamber, and can meet the metering requirements of the reaction as the suspended matter intercepted in the filter well increases. When the rainwater inside the buffer chamber is full, the spraying can be stopped. At the same time, the downward impact of rainwater is used to drive the fan blade to drive the rotating rod to drive the nozzle to rotate, so that the flocculant can be sprayed in a dispersed state to increase the uniform contact between the flocculant and the rainwater in the filter well;

[0079] (3) A drainage component is provided. When the amount of rainwater is small, the rainwater can be directly transported to the subsequent treatment stage through the first drainage pipe. When the amount of rainwater is heavy, the excess rainwater can be temporarily stored in the spare tank through the second drainage pipe. When encountering sudden heavy rain, the overflow pipe can also be used to drain the excess water. In addition, due to the effect of the filter element, the pollution in the discharged rainwater can be reduced.

[0080] The following describes a rainwater recycling and reuse system for a power plant according to an embodiment of the present invention.

[0081] The power plant rainwater recycling and reuse system according to the embodiment of the present invention comprises the power plant rainwater filtering device according to any one of the above embodiments.

[0082] The power plant rainwater recycling and reuse system of the embodiment of the present invention can limit the floating range of flocculated sediments and filtered impurities while ensuring the rainwater filtering effect, reducing the area that personnel need to clean, and can perform self-cleaning operations on the flocculated sediments, which is convenient to clean and reduces the scope and cost of maintenance and cleaning.

[0083] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0084] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0085] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0086] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0087] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0088] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A rainwater filtration device for a power plant, characterized in that: include: A water collecting tank, wherein the water collecting tank has a buffer chamber; A filter well, the filter well comprising a first tube, a second tube, a filter plate and a connecting plate, the first tube being arranged in the water collecting box in the up-down direction and part of the first tube extending out of the buffer cavity, the second tube being coaxially arranged in the first tube and communicating with the buffer cavity, the filter plate being arranged in the second tube, the connecting plate being arranged between the first tube and the second tube and limiting the filter cavity with the first tube and the second tube; a liquid inlet pipe, the liquid inlet pipe being connected to the first pipe and used for conveying the collected rainwater into the filter cavity; A sewage discharge assembly, the sewage discharge assembly comprising a sewage discharge pipe connected to the filter cavity, the other end of the sewage discharge pipe extending out of the buffer cavity; A dosing assembly, the dosing assembly comprising a nozzle, the nozzle is arranged in the first tube and is used to deliver flocculant into the filter cavity; A drainage component includes a first drainage pipe connected to the buffer chamber, and the first drainage pipe is used to discharge the filtered rainwater in the buffer chamber.

2. The power plant rainwater filtration device according to claim 1, characterized in that: The dosing assembly includes a medicine box, a rotating box, a rotating rod and a driving member. The medicine box is arranged on the first tube, the rotating box is rotatably arranged below the medicine box and is connected to the medicine box, the rotating box is provided with a medicine discharge hole, the nozzle is fixedly connected to the rotating box corresponding to the medicine discharge hole, the rotating rod is penetrated through the filter plate and is rotatably connected to the filter plate, and the rotating rod is fixedly connected to the nozzle, and the driving member is connected to the rotating rod and is used to drive the rotating rod to rotate.

3. The power plant rainwater filtration device according to claim 2, characterized in that: The dosing assembly includes a plurality of stirring blades, the stirring blades are fixedly connected to the nozzle, and the plurality of stirring blades are arranged in the filter chamber at intervals along the circumference of the first tube; And / or, the driving member is a plurality of driving blades, the plurality of driving blades are spaced apart on the rotating rod, the driving blades are arranged in the second tube and on the side of the filter plate away from the medicine box, and the driving blades are inclined and used to rotate under the action of water flow.

4. The power plant rainwater filtration device according to claim 2, characterized in that: The drug dispensing assembly comprises a sealing plate arranged corresponding to the drug discharging hole, the sealing plate is arranged in the rotating box in an adjustable position, and the sealing plate is used to open or block the drug discharging hole.

5. The power plant rainwater filtration device according to claim 4, characterized in that: The dosing assembly includes a sealing cylinder, a first elastic member, a driving plate and a traction member. The sealing cylinder cover is arranged at the bottom of the rotating box. The sealing plate moves radially along the sealing cylinder and is sealingly penetrated by the sealing cylinder. The first elastic member is arranged corresponding to the sealing plate. The two ends of the first elastic member are respectively connected to the sealing plate and the side wall of the rotating box and are used to drive the sealing plate to move away from the sealing cylinder. The driving plate is arranged on the rotating rod and its axial position along the rotating rod is adjustable. The driving plate is used to move away from the medicine box under the action of water flow. The two ends of the traction member are connected to the sealing plate and the driving plate.

6. The power plant rainwater filtration device according to claim 1, characterized in that: It includes a check well, which includes a third pipe and a liquid level measuring device. The third pipe is passed through the water collecting box and part of the third pipe passes through the water collecting box. The third pipe is connected with the buffer cavity, and the liquid level measuring device is arranged in the third pipe.

7. The power plant rainwater filtration device according to claim 6, characterized in that: It includes a controller, and the drainage component includes a water pump, a shunt pipe, a switching valve, a second drainage pipe, and a spare box. The water pump is arranged in the buffer cavity, the shunt pipe is arranged at the infusion end of the water pump, the switching valve is arranged at the end of the shunt pipe and is provided with a first interface and a second interface, the controller is electrically connected to the switching valve and is used to drive the output end of the switching valve to directly switch between the first interface and the second interface, the first drainage pipe is connected to the first interface, the second drainage pipe is connected to the second interface, and the second drainage pipe is connected to the spare box.

8. The power plant rainwater filtering device according to claim 6, characterized in that: The water collecting box includes a bottom plate, and the side surface of the bottom plate located in the buffer cavity is arranged in a slope. The filter well is arranged at the bottom of the slope, and the inspection well is arranged at the top of the slope. The sewage discharge component includes a sewage suction pipe and a connecting pipe. The sewage suction pipe is arranged at the bottom of the buffer cavity, and a plurality of sewage suction holes are arranged at intervals on the sewage suction pipe. The connecting pipe is connected to the first pipe and communicated with the filter cavity, and the other end of the connecting pipe is communicated with the sewage suction pipe, and the sewage discharge pipe is communicated with the sewage suction pipe.

9. The power plant rainwater filtration device according to claim 1, characterized in that: An overflow pipe is provided on the first pipe, the overflow pipe has the same height as the liquid inlet pipe, and a filter element for filtering rainwater is provided at one end of the overflow pipe connected to the first pipe; And / or, a portion of the first tube located in the buffer cavity is provided with a plurality of filter windows spaced apart along the circumferential direction, and the filter windows are provided above the filter plate.

10. A rainwater recycling system for a power plant, characterized in that: The invention comprises the power plant rainwater filtering device as described in any one of claims 1 to 9.

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